We postpone a detailed analysis of the data collected during our search
for flickering for the program stars to a follow-up paper. Derivation of
temperature and radius of the region(s) responsible for the observed
flickering (e.g. [1]}) is straightforward but
largely out of the goals of this paper, as it is the search about possible
quasi-periodicities or signatures of the WD rotation (e.g.
[2]}, [3]}). Such analysis will
strongly benefit from further observations we have planned for the SySt
reported in this paper and are carrying out also for other SySt assigned to
later papers in this series.
